CN110713966A - Method for promoting N-acetylglucosamine synthesis by utilizing GlcN6P sensing component - Google Patents

Abstract

The invention discloses a method for promoting synthesis of N-acetylglucosamine by utilizing a GlcN6P induction component, belonging to the technical field of genetic engineering. The invention uses bacillus subtilis BSGNY-P_veg‑glmS‑P₄₃GNA1 is an original strain, and a CRISPR system regulated by a GlcN6P response component is integrated on a genome to dynamically weaken a N-acetylglucosamine synthesis competition pathway; meanwhile, a GlcN6P response promoter is utilized to regulate the expression of GNA1 on a plasmid so as to dynamically regulate an N-acetylglucosamine synthesis pathway; and a key gene alsSD of the acetoin synthetic pathway is knocked out. When the strain is subjected to fed-batch fermentation on a 15L fermentation tank, the yield of N-acetylglucosamine reaches 131.6g/L, and no byproduct acetoin is accumulated, so that the method lays a foundation for industrial fermentation method production of GlcNAcThe foundation is made.

Description

Method for promoting N-acetylglucosamine synthesis by utilizing GlcN6P sensing component

Technical Field

The invention relates to a method for promoting N-acetylglucosamine synthesis by utilizing a GlcN6P sensing component, belonging to the technical field of genetic engineering.

Background

Acetylglucosamine is a monosaccharide in organisms, and is widely present in bacteria, yeast, mold, plants and animals. In the human body, acetylglucosamine is a synthetic precursor of disaccharide unit of glycosaminoglycan, which plays an important role in the repair and maintenance of the function of cartilage and joint tissues. Therefore, acetylglucosamine is widely used as a pharmaceutical and dietary supplement to treat and repair joint damage. In addition, acetylglucosamine has many applications in the cosmetic field. At present, the acetyl glucosamine is mainly produced by acidolysis of chitin in shrimp shells or crab shells, the waste liquid produced by the method has serious environmental pollution, and the obtained product is easy to cause anaphylactic reaction and is not suitable for people with seafood allergy to take.

Bacillus subtilis is a production host widely used as food enzyme preparation and important nutritional chemicals, and the product is certified as "general regulated as safe" (GRAS) level by FDA. Therefore, the construction of the recombinant bacillus subtilis by using a metabolic engineering means is an effective way for producing food safety-grade acetylglucosamine. When synthesizing N-acetylglucosamine using glucose as a substrate, the glycolysis pathway, the pentose phosphate pathway, and the peptidoglycan synthesis pathway competitively utilize glucose that enters the cell, thereby limiting efficient synthesis of N-acetylglucosamine. The patent application with publication number CN108148797A provides a recombinant Bacillus subtilis (BSGNX-dCas9-zpg), which weakens the three competitive ways by using a CRISPII system induced by xylose, so that the yield of N-acetylglucosamine and the product conversion rate reach higher levels, and the catabolite repression effect is relieved after modification so that the recombinant Bacillus subtilis can utilize glucose and xylose together. However, xylose is much more expensive than glucose in market price, so that the production cost is increased when the xylose is used in fermentation production, and the complexity of fermentation operation is increased when an inducer is added, so that the recombinant bacillus subtilis needs to be further modified to automatically regulate related metabolic networks and efficiently synthesize the N-acetylglucosamine when glucose is used as a sole carbon source.

Therefore, the method for synthesizing the N-acetylglucosamine has low cost, simple operation, no need of adding an inducer and high efficiency, and has important value for industrial application of the N-acetylglucosamine.

Disclosure of Invention

In order to solve the problems of complex operation caused by adding an inducer in the fermentation process and production cost increase caused by adding xylose, the invention only uses glucose as a unique carbon source and utilizes the recombinant bacillus subtilis to continuously and efficiently synthesize the N-acetylglucosamine.

The first purpose of the invention is to provide a method for promoting N-acetylglucosamine synthesis, which uses a GlcN6P sensing component to control the expression of N-acetylglucosamine acetylase GNA1 so as to dynamically regulate the N-acetylglucosamine synthesis pathway; simultaneously, a GlcN6P sensing component is used for regulating and controlling the expressed dCas9 protein and three complexes formed after sgRNA expression fragments which respectively act on zwf and pfkA and glmM genes are combined to dynamically weaken glycolysis pathways, pentose phosphate pathways and peptidoglycan synthesis pathways; the GlcN6P sensing component comprises a transcription factor GamR of bacillus subtilis and a promoter containing a GamR binding site, and the promoter is P_gamAA promoter or a hybrid promoter constructed by adding a GamR binding site to a constitutive promoter.

In one embodiment of the present invention, the amino acid sequence of the transcription factor GamR comprises positions 1-235 of the amino acid sequence with NCBI accession No. WP _ 015382651.1.

In one embodiment of the invention, the promoter P_gamAThe nucleotide sequence of (A) is shown as SEQ ID NO.5, and the constructed hybrid promoter comprises P_vg1、P_vg2、P_vg3、P_vg4、P_vg5、P_vg6、P_vg7、P_rg、P_lg、P_vg、P_sg、P_sg1、P_sg2、P_sg3The nucleotide sequences are respectively shown as SEQ ID NO.6-SEQ ID NO. 19.

In one embodiment of the invention, the amino acid sequence of the N-acetylglucosamine acetylase GNA1 is shown as SEQ ID No. 2.

In one embodiment of the invention, the N-acetylglucosamine acetylase GNA1 uses a vector pSTg-GNA1 as an expression vector, the nucleotide sequence of the vector pSTg-GNA1 is shown as SEQ ID NO.1, and a promoter P is used_gamAThe gene coding the GNA1 is connected to a vector pSTOP1622 to replace the repressor xylR and a promoter P on the vector pSTOP1622_xylAAnd (4) obtaining the product. The vector pSTOP1622 was constructed as described in the literature: biedendrieck, r., Yang, y., Deckwer, w.d., Malten, m., Jahn, d.,2007.Plasmid system for the intracellulary production and purification of affinity-tagged proteins in bacillus megaterium.biotechnol.bioeng.96, 525-537.

In one embodiment of the invention, the expression of GNA1 is accomplished by transforming the free vector pSTg-GNA1 into bacillus subtilis and selecting transformants using tetracycline.

In one embodiment of the invention, the amino acid sequence of the dCas9 protein is shown as SEQ ID No.1 in patent CN 108148797A.

In one embodiment of the invention, the nucleotide sequence of the dCas9 protein and the vector pLCg-dCas9 is shown in SEQ ID NO.3, and the repressor protein XylR and the xylose promoter in the vector pLCx-dCas9 (the construction method is described in the patent application with the publication number CN 108148797A) are replaced by gamR and P_gamAAnd (4) obtaining the product. P of the vector pLCx-dCas9_gamAThe upstream contains chloramphenicol resistance gene which can be used for resistance screening; in the chloramphenicol resistance gene-P_gamAdCas9 is flanked by upstream and downstream homology arms of the Bacillus subtilis lacA gene.

In one embodiment of the invention, the expression of dCas9 protein is integrated into Bacillus subtilis BSGNY-P by transforming pLCg-dCas9 vector linearized with the endonuclease Eco91I_veg-glmS-P₄₃lacA site on the GNA1 genome.

In one embodiment of the invention, the nucleotide sequence of the sgRNA expression fragment acting on zwf is shown as SEQ ID No.2 in patent CN 108148797A; the nucleotide sequence of the sgRNA expression fragment acting on pfkA is shown as SEQ ID NO.3 in patent CN 108148797A; the nucleotide sequence of the sgRNA expression fragment acting on glmM is shown as SEQ ID NO.4 in patent CN 108148797A.

In one embodiment of the invention, the expression fragment of sgRNA is integrated into the recombinant Bacillus subtilis genome by transforming linearized integration vector psga-zpg (the construction method is described in the patent application with publication number CN 108148797A), and the nucleotide sequence of the vector psga-zpg is shown as SEQ ID NO.7 in patent CN 108148797A.

In one embodiment of the present invention, after binding of three sgRNA expression fragments acting on zwf and pfkA and glmM gene and dCas9, the glycolysis pathway, pentose phosphate pathway and peptidoglycan synthesis pathway can be dynamically weakened by CRISPRi mechanism, specifically, sgRNA formed by transcription can form a complex with dCas9 protein, and then is guided to recognize and bind to genomic DNA specifically complementary to the sgRNA, so that RNA polymerase is prevented from passing through the gene, the transcription process of the gene is inhibited, and the expression of a specific gene is weakened. Because the dCas9 protein is expressed dynamically using the GlcN6P sensor, the attenuation process is also dynamic. For specific principles of CRISPRi see literature: gilbert LA, Larson MH, Morshut L, Liu Z, Brar GA, Torres SE, Stern-Ginosbar N, Brandman O, Whitehead EH, Doudna JA, Lim WA, Weissman JS, Qi LS.2013.CRISPR-mediated modulated RNA-modulated regulation of transcription in eukaryotes.Cell154:442.

In one embodiment of the invention, the expression fragment of sgRNA is integrated into the recombinant Bacillus subtilis BSGNY-P through the psga-zpg vector after the linearization of the transformation endonuclease Eco91I_veg-glmS-P₄₃amyE site on the GNA1 genome.

In one embodiment of the invention, the method further comprises knocking out a key gene alsSD for synthesizing the byproduct acetoin in the bacillus subtilis.

In one embodiment of the invention, the key gene alsSD of the acetoin synthesis pathway is knocked out by converting an alsSD knock-out frame, the nucleotide sequence of the knock-out frame is shown as SEQ ID NO.4, and the knock-out frame is obtained by fusing the upstream and downstream homologous arms of the alsSD gene with a spectinomycin resistance gene through fusion PCR.

In an embodiment of the present invention, the knockout of the key gene for the synthesis of the byproduct acetoin is specifically: firstly, taking a bacillus subtilis genome as a template, and amplifying 1000bp of each of upstream and downstream homology arms of alsSD; then, amplifying a spectinomycin resistance gene fragment by using a p7S6 plasmid as a template; then fusing the upstream and downstream homologous arms of alsSD with spectinomycin resistance genes through fusion PCR to obtain a knockout frame; after the knock-out frame is directly transformed into bacillus subtilis, a spectinomycin resistant plate is used for screening. The p7S6 plasmid and detailed gene knockout methods can be found in the literature: yan X, Yu HJ, Hong Q, Li SP.2008.cre/lox system and PCR-based genome engineering in Bacillus subtilis.appl.environ.Microbiol.74: 5556-.

The second purpose of the invention is to provide a recombinant bacillus subtilis which dynamically controls the N-acetylglucosamine synthesis pathway by controlling the expression of N-acetylglucosamine acetylase GNA1 by using a GlcN6P sensing component; simultaneously, a GlcN6P sensing component is used for regulating and controlling the expressed dCas9 protein and three complexes formed after sgRNA expression fragments which respectively act on zwf and pfkA and glmM genes are combined to dynamically weaken glycolysis pathways, pentose phosphate pathways and peptidoglycan synthesis pathways; the GlcN6P sensing component comprises a transcription factor GamR of bacillus subtilis and a promoter containing a GamR binding site, the amino acid sequence of the transcription factor GamR contains 1 st to 235 th sites of the amino acid sequence with NCBI number WP _015382651.1, and the promoter is P_gamAA promoter or a hybrid promoter constructed by adding a GamR binding site to a constitutive promoter.

A third object of the present invention is to provideThe construction method of the genetic engineering bacteria is that the Bacillus subtilis BSGNY-P is used_veg-glmS-P₄₃-GNA1 as the starting strain; the starting strain is obtained by modifying the genotype of a bacillus subtilis 168(BS168) as a basis as follows: Δ nagP Δ gamP Δ gamA Δ nagA Δ nagB Δ ldh Δ pta Δ glcK Δ pckA Δ pyk lox72 with promoter P_vegRegulated expression of the phosphatase yqaB from E.coli with glmS of Bacillus subtilis 168 itself, on a plasmid with promoter P₄₃Modulating recombinant expression of GNA 1.

In one embodiment of the invention, the Bacillus subtilis BSGNY-P_veg-glmS-P₄₃GNA1, the method of construction is described in patent application publication No. CN 107699533A.

The fourth purpose of the invention is to provide a method for producing acetylglucosamine, which is to carry out seed culture on the recombinant bacillus subtilis and then transfer the bacillus subtilis into a fermentation culture medium for fermentation culture.

In one embodiment of the invention, the method comprises the steps of placing the recombinant Bacillus subtilis into 35-39 ℃, 200-220rpm, culturing for 10-15h, transferring 1-10% of the seed into a shake flask fermentation medium, and culturing for 50-70h under the conditions of 35-39 ℃, 200-220 pm.

In one embodiment of the invention, the method comprises transferring seeds cultured for 10-15h at 35-39 ℃ and 200-220rpm into an upper tank fermentation medium with the inoculation amount of 1-10%, culturing in a fermentation tank with the liquid loading amount of 30-50% at 35-39 ℃ and pH of 6.5-7.5 with the aeration amount of 1-2vvm, maintaining the dissolved oxygen at more than 30% at the rotation speed of 500-900rpm, and continuously adding 750g/L to control the glucose concentration at 1-30 g/L.

The invention also provides the application of the recombinant bacillus subtilis or the method for promoting the synthesis of the N-acetylglucosamine in the fields of food, pharmacy, nutrition and health care products or cosmetics.

The invention has the beneficial effects that:

(1) the invention provides a construction method of a GlcN6P sensing component, and a series of synthetic promoters which can be activated by intracellular GlcN6P are obtained. The method for efficiently synthesizing the N-acetylglucosamine by using the glucose is realized by using the sensing component, namely, the continuous and efficient synthesis of the N-acetylglucosamine is promoted by regulating and controlling the N-acetylglucosamine synthesis pathway and main competitive pathways (glycolysis pathway, pentose phosphate pathway and peptidoglycan synthesis pathway) thereof through a GlcN6P sensing component; and furthermore, by a synthetic way of knocking out the byproduct acetoin, the accumulation of the byproduct is avoided, and the yield of the N-acetylglucosamine is further improved.

(2) The recombinant bacillus subtilis constructed by the invention can continuously and efficiently utilize glucose to synthesize acetylglucosamine, the yield of the recombinant bacillus subtilis can reach 28.0g/L on a shake flask, and the yield of the recombinant bacillus subtilis can reach 131.6g/L when fed-batch fermentation is carried out on a 15L fermentation tank, so that the recombinant bacillus subtilis is the highest level of the current fermentation production, and lays a foundation for industrialization of the recombinant bacillus subtilis.

Drawings

FIG. 1 shows the principle of GlcN6P on the regulation of related genes. 1A is glucose (Glc), glucosamine (GlcN) and N-acetylglucosamine (GlcNAc) catabolism related genes in Bacillus subtilis, 1B is the regulating effect of GlcN6P on the GlcN and GlcNac catabolism related genes, and 1C is the regulating mechanism of GlcN6P on a promoter PgamA.

Fig. 2 shows a constructed GlcN6P response component. 2A is a partial sequence of a promoter containing a GamR binding site, and 2B is a change in strength of these promoters before and after GamR binding.

FIG. 3 is a verification of the regulation effect of GlcN6P response components. 3A for activation, 3B for inhibition, and 3C for simultaneous activation and inhibition.

FIG. 4 shows the cell growth and product synthesis under control of a GlcN6P response element; 4A is a realization process of regulation and control by utilizing a GlcN6P response component, 4B is the cell dry weight 24h after the regulation and control by utilizing a GlcN6P response component, 4C is the cell dry weight 36h, 4D is the synthesis condition of GlcNAc, and 4E is the synthesis condition of a byproduct acetoin.

FIG. 5 is the result of fed-batch fermentation on a 15L tank of BNDR 022.

FIG. 6 is the result of fed-batch fermentation on a 15L tank of BNDR 122.

Detailed Description

Seed medium (g/L): tryptone 10, yeast powder 5 and NaCl 10.

Shake flask fermentation medium (g/L): tryptone 6, yeast powder 12, urea 6, K₂HPO₄·3H₂O 12.5，KH₂PO₄2.5，CaCO₃5, trace elements 10 ml/L; the trace element solution contains in g/L: MnSO₄·5H₂O 1.0，CoCl₂·6H₂O0.4，NaMoO₄·2H₂O 0.2，ZnSO₄·7H₂O 0.2，AlCl₃·6H₂O 0.1，CuCl₂·H₂O 0.1，H₃BO₄0.05, 5M HCl.

Fermenter fermentation Medium (g/L): tryptone 20, yeast powder 20, urea 10, K₂HPO₄·3H₂O 12.5，KH₂PO₄2.5，CaCO₃5, trace elements 10 ml/L; the trace element solution contains in g/L: MnSO₄·5H₂O 1.0，CoCl₂·6H₂O 0.4，NaMoO₄·2H₂O 0.2，ZnSO₄·7H₂O 0.2，AlCl₃·6H₂O 0.1，CuCl₂·H₂O 0.1，H₃BO₄0.05, 5M HCl.

The method for measuring the acetylglucosamine comprises the following steps: high Performance Liquid Chromatography (HPLC) detection: agilent 1260, RID detector, HPX-87H column (Bio-Rad Hercules, Calif.), mobile phase: 5mM H₂SO₄The flow rate is 0.6mL/min, the column temperature is 35 ℃, and the injection volume is 10 mu L.

Example 1: construction of GlcN6P sensing component

The working mechanism of the invention is as follows: in B.subtilis, glucosamine-6-phosphate (GlcN6P) is an important metabolic regulator. When glucose is used as the carbon source, its intracellular concentration is regulated by feedback mediated by the glmS riboswitch. On the other hand, when glucosamine (GlcN) or N-acetylglucosamine (GlcNAc) is used as the carbon source, GlcN6P activates the expression of the operon involved in catabolism of these two carbon sources, respectively, by transcriptionFactor GamR or NagR (fig. 1). Wherein the regulation principle of GamR is shown in FIG. 1C, and the GamR can be recognized and combined to a promoter P_gamAThereby preventing the binding of RNA polymerase and the initiation of transcription. When intracellular GlcN6P concentration is above its response threshold, gamO will bind to GamR and change its structure so that it loses its response to promoter P_gamAThe binding capacity of (A) can be such that transcription proceeds normally (gaugue, I.A., Oberto, J.A., Plumbridge, J.2014. Regulation of amino sugar utilin Bacillus subtilis by the GntR family regulators, NagR and gamR. mol. Microbiol.92, 100-115. https:// doi.org/10.1111/mmi.12544). Therefore, the regulation system can be used for modification and can be used for realizing automatic regulation of N-acetylglucosamine and a main competitive pathway thereof, thereby promoting the continuous and efficient flow of glucose to N-acetylglucosamine synthesis.

The GlcN6P sensing component constructed by the invention consists of a transcription factor GamR and a promoter containing a GamR binding site, and the partial sequence of the promoter containing the GamR binding site is shown in FIG. 2A. An action mechanism of the sensing component controlled by intracellular GlcN6P is shown in FIG. 1C, when the concentration of GlcN6P is low, GamR is combined with a promoter containing a combination site thereof, and transcription of downstream genes is limited; as GlcN6P concentration increases, GamR is less and less bound to the promoter, so that transcription of downstream genes is increased.

In order to construct response elements with different strengths, a series of hybrid promoters (the nucleotide sequence is shown in SEQ ID NO.6-SEQ ID NO. 19) containing GamR binding sites are designed and connected to a vector containing green fluorescent protein after synthesis, a gamR gene in wild type bacillus subtilis 168(BS168) is knocked out to obtain a recombinant strain BS01(BS168 △ gamR), plasmids containing the hybrid promoters are respectively transformed into BS168 and BS01, and the expression conditions of the promoters before and after the gamR binding are verified.

FIG. 2B is a graph showing the variation in strength of different hybrid promoters in the presence or absence of GamR expression, wherein P is present in these promoters_vg6、P_gamAAnd P_sg2Before and after GamR bindingIn order to further verify the response of the three promoters to GlcN6P, related genes nagB and gamA of GlcN6P flowing into glycolytic pathway were knocked out in BS01 to obtain recombinant strain BS03(BS168 △ gamR △ nagB △ gamA), so that the intracellular concentration of GlcN6P could be controlled by adding different concentrations of GlcN.Using the control structures shown in FIGS. 3A and 3B, the activation and suppression effects of the gene mediated by the response of the GlcN6P component were verified, respectively, the activation was verified by placing both gamR and a promoter containing a gamR binding site on the same vector, and the influence of GlcN on the promoter strength was verified by GFP, and P was verified by P_vg6、P_gamAAnd P_sg2All increase with increasing GlcN addition, and when the addition is at 1g/L to reach the maximum, and beyond this concentration does not increase, and the three promoter intensity is about 1:3: 4; in order to verify the inhibition, the repressor XylR and xylose promoter in pLCx-dCas9 were replaced with gamR and P, respectively_vg6gamR and P_gamAgamR and P_sg2To obtain the vectors pLCv-dCas9, pLCg-dCas9 and pLCs-dCa 9. The three vectors are respectively linearized by using Eco91I and then transformed into BS03, and then transformed into plasmids of a GFP-specific sgRNA expression vector psga-GFP (nucleotide sequence is shown as SEQ ID NO.20) linearized by Eco31I and constitutively expressed GFP to obtain strains BS13, BS23 and BS 33. By measuring the expression of the fluorescent protein by adding GlcN, the inhibition intensity is similarly increased with the increase of the amount of GlcN added, and the attenuation of the three promoters is also P_vg6<P_gamA<P_sg2. Finally, the effect of simultaneous activation and inhibition with a GlcN6P response component was verified using Green Fluorescent Protein (GFP) and red fluorescent protein (mCherry), as shown in fig. 3C.

Example 2: GlcNAc synthesis regulated by GlcN6P response component

In order to utilize the constructed GlcN6P response component to regulate GlcNAc synthesis, the recombinant Bacillus subtilis BSGNY-P constructed in the patent application with the publication number CN107699533A_veg-glmS-P₄₃Knocking out the gamR gene of GNA1 to obtain recombinant strain BNDR 000. Introducing a vector pLCg-dCas9 (nucleotide sequence shown as SEQ ID NO. 3) and paga-zpg (nucleotide sequence shown as SEQ ID NO.7 in patent CN 108148797A) are linearized by using endonuclease Eco91I, BNDR000 is converted to obtain BNDR020, and then the substrate P is subjected to_gamAThe regulated GNA1 expression vector pSTg-GNA1 (the nucleotide sequence is shown in SEQ ID NO. 1) is transformed into BNDR020 to obtain a recombinant strain BNDR022, and finally a key gene alsSD synthesized by a byproduct acetoin is knocked out to obtain a recombinant strain BNDR 122.

Example 3: fermentation production of acetylglucosamine by recombinant bacillus subtilis BNDR122

The recombinant bacillus BNDR022 constructed in the example 2 is adopted for shake flask fermentation, and the bacillus subtilis BSGNY-P is used_veg-glmS-P₄₃GNA1 was used as a control, and was cultured and fermented under the same conditions. Seeds cultured at 37 ℃ and 220rpm for 12 hours are transferred to a fermentation medium at an inoculum size of 5%, and cultured at 37 ℃ and 220rpm for 60 hours. The GlcNAc content in the final fermentation supernatant reached 28.0g/L, which is compared with the strain (BSGNY-P)_veg-glmS-P₄₃GNA1) increased by 53.0%; meanwhile, the yield of glucose by fermenting N-acetylglucosamine with the recombinant bacillus subtilis provided by the invention is improved from 0.244g/g glucose to 0.373g/g glucose, but the strain BNDR still generates a 10g/L byproduct acetoin. In order to eliminate the production of acetoin, an acetoin synthesis key gene alsSD is knocked out to obtain a recombinant strain BNDR122, and the strain is subjected to 15L fermentation tank level verification. The seeds cultured at 37 ℃ and 220rpm for 12h are transferred to a fermentation medium in an upper tank at an inoculum size of 5 percent and cultured in a 15L fermentation tank at 37 ℃ and a pH value of 7.0, the ventilation volume is 1.5vvm, and the rotation speed is controlled between 500 and 900rpm to maintain the dissolved oxygen at more than 30 percent. The initial liquid loading was 7.5L and 750g/L was continuously fed to control the glucose concentration between 1 and 30 g/L. The final fermentation supernatant fluid contains acetylglucosamine up to 131.6g/L, which is the highest level of the current fermentation production and lays a foundation for industrialization.

Comparative example 1: modulation of GlcNAc synthesis using different GlcN6P sensing devices

In the method, a GlcN6P sensing component is used for realizing the key of GlcNAc synthesisThe gene GNA1 was enhanced and its key genes zwf, pfkA and glmM, which compete mainly for the pathway, were attenuated (FIG. 4A), thereby promoting the efficient and sustained synthesis of GlcNAc by recombinant Bacillus subtilis using glucose. The invention obtains three GlcN6P response promoters P with different intensities_vg6、P_gamAAnd P_sg2Among the three promoters used for the enhancement and attenuation in the recombinant strain BNDR122, the promoter P of moderate strength_gamAAnd (5) regulating and controlling. To compare the effects of promoters of different strengths, vector pLCs-dCas9 (P in vector pLCg-dCas 9) was used_gamAPromoter replacement by P_sg2) And pLCv-dCas9 (P in vector pLCg-dCas 9)_gamAPromoter replacement by P_vg6) To P_sg2And P_vg6The expressed dCas9 was integrated; and convert to utilize P_sg2And P_vg6Vector pSTs-GNA1 for regulating expression of GNA1 (vector pSTg-P in GNA1)_gamAPromoter replacement by P_sg2) And pSTv-GNA1 (P in vector pSTg-GNA 1)_gamAPromoter replacement by P_vg6). Comparison of the results of enhancement and attenuation with combinations of promoters of different strengths is shown in FIGS. 4B-4E, where only promoter P of moderate strength is used for both enhancement and attenuation_gamAThe highest yield of GlcNAc was 28.0 g/L.

Comparative example 2: effect of acetoin Synthesis pathway knock-out

BNDR122 had no byproduct acetoin accumulation compared to BNDR 022. To compare the impact of knocking out the key acetoin synthesis gene alsSD, BNDR022 and BNDR122 were subjected to fed-batch fermentation on a 15L fermentor, and the results of the fermentation are shown in FIGS. 5 and 6. The by-product acetoin generated by BNDR022 can finally reach 22.9g/L, and the yield of GlcNAc can reach 96.3 g/L; compared with the prior art, the yield of GlcNAc of BNDR122 can reach 131.6g/L, and no byproduct acetoin is generated, so that the method not only lays a foundation for further fermentation production, but also is more beneficial to the subsequent separation and purification process.

Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

SEQUENCE LISTING

<110> university of south of the Yangtze river

<120> method for promoting N-acetylglucosamine synthesis by utilizing GlcN6P sensing component

<160>20

<170>PatentIn version 3.3

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<211>5755

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catcattgga aaacgttctt cggggcgaaa actctcaagg atcttaccgc tgttgagatc 1620

cagttcgatg taacccactc gtgcacccaa ctgatcttca gcatctttta ctttcaccag 1680

cgtttctggg tgagcaaaaa caggaaggca aaatgccgca aaaaagggaa taagggcgac 1740

acggaaatgt tgaatactca tactcttcct ttttcaatat tattgaagca tttatcaggg 1800

ttattgtctc atgagcggat acatatttga atgtatttag aaaaataaac aaataggggt 1860

tccgcgcaca tttccccgaa aagtgccacc tgacgtctaa gaaaccatta ttatcatgac 1920

attaacctat aaaaataggc gtatcacgag gccctttcgt cttcaagaat tcctgttata 1980

aaaaaaggat caattttgaa ctctctccca aagttgatcc cttaacgatt tagaaatccc 2040

tttgagaatg tttatataca ttcaaggtaa ccagccaact aatgacaatg attcctgaaa 2100

aaagtaataa caaattacta tacagataag ttgactgatc aacttccata ggtaacaacc 2160

tttgatcaag taagggtatg gataataaac cacctacaat tgcaatacct gttccctctg 2220

ataaaaagct ggtaaagtta agcaaactca ttccagcacc agcttcctgc tgtttcaagc 2280

tacttgaaac aattgttgat ataactgttt tggtgaacga aagcccacct aaaacaaata 2340

cgattataat tgtcatgaac catgatgttg tttctaaaag aaaggaagca gttaaaaagc 2400

taacagaaag aaatgtaact ccgatgttta acacgtataa aggacctctt ctatcaacaa 2460

gtatcccacc aatgtagccg aaaataatga cactcattgt tccagggaaa ataattacac 2520

ttccgatttc ggcagtactt agctggtgaa catctttcat catataagga accatagaga 2580

caaaccctgc tactgttcca aatataattc ccccacaaag aactccaatc ataaaaggta 2640

tatttttccc taatccggga tcaacaaaag gatctgttac tttcctgata tgttttacaa 2700

atatcaggaa tgacagcacg ctaacgataa gaaaagaaat gctatatgat gttgtaaaca 2760

acataaaaaa tacaatgcct acagacatta gtataattcc tttgatatca aaatgacctt 2820

ttatccttac ttctttcttt aataatttca taagaaacgg aacagtgata attgttatca 2880

taggaatgag tagaagatag gaccaatgaa tataatgggc tatcattcca ccaatcgctg 2940

gaccgactcc ttctcccatg gctactatcg atccaataag accaaatgct ttacccctat 3000

tttcctttgg aatatagcgc gcaactacaa ccattacgag tgctggaaat gcagctgcac 3060

cagccccttg aataaaacga gccataataa gtaaggaaaa gaaagaatgg ccaacaaacc 3120

caattaccga cccgaaacaa tttattataa ttccaaatag gagtaacctt ttgatgccta 3180

attgatcaga tagctttcca tatacagctg ttccaatgga aaaggttaac ataaaggctg 3240

tgttcaccca gtttgtactc gcaggtggtt tattaaaatc atttgcaata tcaggtaatg 3300

agacgttcaa aaccatttca tttaatacgc taaaaaaaga taaaatgcaa agccaaatta 3360

aaatttggtt gtgtcgtaaa ttcgattgtg aataggatgt attcacattt caccctccaa 3420

taatgagggc agacgtagtt tatagggtta atgatacgct tccctctttt aattgaaccc 3480

tgttacattc attacacttc ataattaatt cctcctaaac ttgattaaaa cattttacca 3540

catataaact aagttttaaa ttcagtattt catcacttat acaacaatat ggcccgtttg 3600

ttgaactact ctttaataaa ataatttttc cgttcccaat tccacattgc aataatagaa 3660

aatccatctt catcggcttt ttcgtcatca tctgtatgaa tcaaatcgcc ttcttctgtg 3720

tcatcaaggt ttaatttttt atgtatttct tttaacaaac caccatagga gattaacctt 3780

ttacggtgta aaccttcctc caaatcagac aaacgtttca aattcttttc ttcatcatcg 3840

gtcataaaat ccgtatcctt tacaggatat tttgcagttt cgtcaattgc cgattgtata 3900

tccgatttat atttattttt cggtcgaatc atttgaactt ttacatttgg atcatagtct 3960

aatttcattg cctttttcca aaattgaatc cattgttttt gattcacgta gttttctgta 4020

ttcttaaaat aagttggttc cacacatacc aatacatgca tgtgctgatt ataagaatta 4080

tctttattat ttattgtcac ttccgttgca cgcataaaac caacaagatt tttattaatt 4140

tttttatatt gcatcattcg gcgaaatcct tgagccatat ctgacaaact cttatttaat 4200

tcttcgccat cataaacatt tttaactgtt aatgtgagaa acaaccaacg aactgttggc 4260

ttttgtttaa taacttcagc aacaaccttt tgtgactgaa tgccatgttt cattgctctc 4320

ctccagttgc acattggaca aagcctggat ttacaaaacc acactcgata caactttctt 4380

tcgcctgttt cacgattttg tttatactct aatatttcag cacaatcttt tactctttca 4440

gcctttttaa attcaagaat atgcagaagt tcaaagtaat caacattagc gattttcttt 4500

tctctccatg gtctcacttt tccacttttt gtcttgtcca ctaaaaccct tgatttttca 4560

tctgaataaa tgctactatt aggacacata atattaaaag aaacccccat ctatttagtt 4620

atttgtttgg tcacttataa ctttaacaga tggggttttt ctgtgcaacc aattttaagg 4680

gttttcaata ctttaaaaca catacatacc aacacttcaa cgcacctttc agcaactaaa 4740

ataaaaatga cgttatttct atatgtatca agataagaaa gaacaagttc aaaaccatca 4800

aaaaaagaca ccttttcagg tgcttttttt attttataaa ctcattccct gatctcgact 4860

tcgttctttt tttacctctc ggttatgagt tagttcaaat tcgttctttt taggttctaa 4920

atcgtgtttt tcttggaatt gtgctgtttt atcctttacc ttgtctacaa accccttaaa 4980

aacgttttta aaggctttta agccgtctgt acgttcctta agatcaacgt gatataggtt 5040

tgctaacctt tgcgttcact taaggaatta gcttggtacg gatccctttt ataacaaatt 5100

ttcagaaatt aatattgaca gtttgataag ggcggtgcta aattcgtaat gacaagtatc 5160

ataaattggt cataacaaat atggtgcttg tctatctcag tgatagcggt accattatag 5220

gtaagagagg aatgtacaca tgcaccacca ccaccaccac agccatatct tcgacgcatc 5280

tgtactggct ccacatattc ctagtaacct tcctgataat ttcaaggtga gaccactggc 5340

aaaggatgat ttttcgaagg gatatgtcga cctgctgtca caattgacgt cagttggaaa 5400

ccttgaccaa gaagcatttg agaaacgatt tgaggcgatg agaacaagcg taccgaatta 5460

tcacatcgta gtaattgagg attccaacag ccagaaagtg gtggcgtctg ctagtttggt 5520

tgttgaaatg aaattcattc atggggccgg atcaaggggt cgtgttgaag atgttgtcgt 5580

cgatacagaa atgcgccggc aaaaattagg tgccgtgctt ttaaaaactt tggtgtcact 5640

tggcaaatct ttaggcgtct acaaaataag cctcgaatgc gtcccggaat tactcccgtt 5700

ctattcccaa tttggctttc aggatgactg taattttatg acccagcgct tttaa 5755

<210>2

<211>171

<212>PRT

<213> Artificial Synthesis

<400>2

Met His His His His His His Ser His Ile Phe Asp Ala Ser Val Leu

1 5 10 15

Ala Pro His Ile Pro Ser Asn Leu Pro Asp Asn Phe Lys Val Arg Pro

20 25 30

Leu Ala Lys Asp AspPhe Ser Lys Gly Tyr Val Asp Leu Leu Ser Gln

35 40 45

Leu Thr Ser Val Gly Asn Leu Asp Gln Glu Ala Phe Glu Lys Arg Phe

50 55 60

Glu Ala Met Arg Thr Ser Val Pro Asn Tyr His Ile Val Val Ile Glu

65 70 75 80

Asp Ser Asn Ser Gln Lys Val Val Ala Ser Ala Ser Leu Val Val Glu

85 90 95

Met Lys Phe Ile His Gly Ala Gly Ser Arg Gly Arg Val Glu Asp Val

100 105 110

Val Val Asp Thr Glu Met Arg Arg Gln Lys Leu Gly Ala Val Leu Leu

115 120 125

Lys Thr Leu Val Ser Leu Gly Lys Ser Leu Gly Val Tyr Lys Ile Ser

130 135 140

Leu Glu Cys Val Pro Glu Leu Leu Pro Phe Tyr Ser Gln Phe Gly Phe

145 150 155 160

Gln Asp Asp Cys Asn Phe Met Thr Gln Arg Phe

165 170

<210>3

<211>9954

<212>DNA

<213> Artificial Synthesis

<400>3

tcgagttcat gtgcagctcc atcagcaaaa ggggatgata agtttatcac caccgactat 60

ttgcaacagt gccgttgatc gtgctatgat cgactgatgt catcagcggt ggagtgcaat 120

gtcatgaggg aagcggtgat cgccgaagta tcgactcaac tatcagaggt agttggcgtc 180

atcgagcgcc atctcgaacc gacgttgctg gccgtacatt tgtacggctc cgcagtggat 240

ggcggcctga agccacacag tgatattgat ttgctggtta cggtgaccgt aaggcttgat 300

gaaacaacgc ggcgagcttt gatcaacgac cttttggaaa cttcggcttc ccctggagag 360

agcgagattc tccgcgctgt agaagtcacc attgttgtgc acgacgacat cattccgtgg 420

cgttatccag ctaagcgcga actgcaattt ggagaatggc agcgcaatga cattcttgca 480

ggtatcttcg agccagccac gatcgacatt gatctggcta tcttgctgac aaaagcaaga 540

gaacatagcg ttgccttggt aggtccagcg gcggaggaac tctttgatcc ggttcctgaa 600

caggatctat ttgaggcgct aaatgaaacc ttaacgctat ggaactcgcc gcccgactgg 660

gctggcgatg agcgaaatgt agtgcttacg ttgtcccgca tttggtacag cgcagtaacc 720

ggcaaaatcg cgccgaagga tgtcgctgcc gactgggcaa tggagcgcct gccggcccag 780

tatcagcccg tcatacttga agctagacag gcttatcttg gacaagaaga agatcgcttg 840

gcctcgcgcg cagatcagtt ggaagaattt gtccactacg tgaaaggcga gatcaccaag 900

gtagtcggca aataagatgc cgctcgccag tcgattggct gagctcatga agttcctatt 960

ccgaagttcc gcgaacgcgt aaaggatcta ggtgaagatc ctttttgata atctcatgac 1020

caaaatccct taacgtgagt tttcgttcca ctgagcgtca gaccccgtag aaaagatcaa 1080

aggatcttct tgagatcctt tttttctgcg cgtaatctgc tgcttgcaaa caaaaaaacc 1140

accgctacca gcggtggttt gtttgccgga tcaagagcta ccaactcttt ttccgaaggt 1200

aactggcttc agcagagcgc agataccaaa tactgtcctt ctagtgtagc cgtagttagg 1260

ccaccacttc aagaactctg tagcaccgcc tacatacctc gctctgctaa tcctgttacc 1320

agtggctgct gccagtggcg ataagtcgtg tcttaccggg ttggactcaa gacgatagtt 1380

accggataag gcgcagcggt cgggctgaac ggggggttcg tgcacacagc ccagcttgga 1440

gcgaacgacc tacaccgaac tgagatacct acagcgtgag ctatgagaaa gcgccacgct 1500

tcccgaaggg agaaaggcgg acaggtatcc ggtaagcggc agggtcggaa caggagagcg 1560

cacgagggag cttccagggg gaaacgcctg gtatctttat agtcctgtcg ggtttcgcca 1620

cctctgactt gagcgtcgat ttttgtgatg ctcgtcaggg gggcggagcc tatggaaaaa 1680

cgccagcaac gcggcctttt tacggttcct ggccttttgc tggccttttg ctcacatgtt 1740

ctttcctgcg ttatcccctg attctgtgga taaccgtatt accgcctttg agtgagctga 1800

taccgctcgc cgcagccgaa cgaccgagcg cagcgagtca gtgagcgagg aagcggaaga 1860

gcgcctgatg cggtattttc tccttacggg aattccatat ggattccgtg atgtcaaagc 1920

ttgaaaaaac gcacgtaaca aaagcaaaat ttatgctcca tgggggagac tacaaccccg 1980

atcagtggct ggatcggccc gatattttag ctgacgatat caaactgatg aagctttctc 2040

atacgaatac gttttctgtc ggcatttttg catggagcgc acttgagccg gaggagggcg 2100

tatatcaatt tgaatggctg gatgatattt ttgagcggat tcacagtata ggcggccggg 2160

tcatattagc aacgccgagc ggagcccgtc cggcctggct gtcgcaaacc tatccggaag 2220

ttttgcgcgt caatgcctcc cgcgtcaaac agctgcacgg cggaaggcac aaccactgcc 2280

tcacatctaa agtctaccga gaaaaaacac ggcacatcaa ccgcttatta gcagaacgat 2340

acggacatca cccggcgctg ttaatgtggc acatttcaaa cgaatacggg ggagattgcc 2400

actgtgattt atgccagcat gctttccggg agtggctgaa atcgaaatat gacaacagcc 2460

tcaagacatt gaaccatgcg tggtggaccc ctttttggag ccatacgttc aatgactggt 2520

cacaaattga aagcccttcg ccgatcggtg aaaatggctt gcatggcctg aatttagatt 2580

ggcgccggtt cgtcaccgat caaacgattt cgttttatga aaatgaaatc attccgctga 2640

aagaattgac gcctgatatc cctatcacaa cgaattttat ggctgacaca ccggatttga 2700

tcccgtatac cgttcgtata gcatacatta tacgaagtta tgccatagtg actggcgatg 2760

ctgtcggaat ggacgatcgg caatagttac ccttattatc aagataagaa agaaaaggat 2820

ttttcgctac gctcaaatcc tttaaaaaaa cacaaaagac cacatttttt aatgtggtct 2880

tttattcttc aactaaagca cccattagtt caacaaacga aaattggata aagtgggata 2940

tttttaaaat atatatttat gttacagtaa tattgacttt taaaaaagga ttgattctaa 3000

tgaagaaagc agacaagtaa gcctcctaaa ttcactttag ataaaaattt aggaggcata 3060

tcaaatgaac tttaataaaa ttgatttaga caattggaag agaaaagaga tatttaatca 3120

ttatttgaac caacaaacga cttttagtat aaccacagaa attgatatta gtgttttata 3180

ccgaaacata aaacaagaag gatataaatt ttaccctgca tttattttct tagtgacaag 3240

ggtgataaac tcaaatacag cttttagaac tggttacaat agcgacggag agttaggtta 3300

ttgggataag ttagagccac tttatacaat ttttgatggt gtatctaaaa cattctctgg 3360

tatttggact cctgtaaaga atgacttcaa agagttttat gatttatacc tttctgatgt 3420

agagaaatat aatggttcgg ggaaattgtt tcccaaaaca cctatacctg aaaatgcttt 3480

ttctctttct attattccat ggacttcatt tactgggttt aacttaaata tcaataataa 3540

tagtaattac cttctaccca ttattacagc aggaaaattc attaataaag gtaattcaat 3600

atatttaccg ctatctttac aggtacatca ttctgtttgt gatggttatc atgcaggatt 3660

gtttatgaac tctattcagg aattgtcaga taggcctaat gactggcttt tataatatga 3720

gataatgccg actgtacttt ttacagtcgg ttttctaaaa cgatacatta ataggtacga 3780

aaaagcaact ttttttgcgc ttaaaaccag tcataccaat aaataacttc gtatagcata 3840

cattatacga acggtacgga attccgttaa ttcagaacag aaatccgcta tattgccaga 3900

ttggcaggat agcggatttt tctttttcta ccttatgctt cagaacgctc ggttgccgcc 3960

gggcgttttt tatactagtg ccttatgaat gatatgactg ttctacggtg aatttcgttc 4020

ggtctccccg tgtaataatt tgcgcatatt ccaccacttc ttcattttta tcataggtaa 4080

gggattctga taaaaacgca ggcgctccga cattggttaa taagtgtccg ctgatcgttt 4140

catccgttaa aatcggttcg atcgattccg tgcccctgct gatttcaata ttgtattttg 4200

tccttaacaa ttcaaacagc gagccggtgc attcctcctg cgccagcccc ggtgccgcct 4260

tccagggaat atatgaggta tgatactgca aaggttcccc ctcggcgtat ctgactctga 4320

caagcttgtt gacaggttca ttctctttca ttttcaaaag ctcggcgatg gaatgatcgg 4380

caggaatcac cacaagctca agcacttttg attcagaacg aagtcctctc atttgttctg 4440

caaagctcgt aatcttatgc ggaatcggcg tttgtatttt ggccgccgat acaaatgtcc 4500

cttttccttg aattctttta atatatccct caagctctag ctgctgcaga gccagtctca 4560

cagttgttct gctgacatca tattgttcgc aaaactcact ctccgtcggc agctgatcat 4620

tcgcctgata tttgcccgat ttaattaact caatgatttt aaacttgata acagaatata 4680

aagctgtcat ttcattctcc ccattctgta tgcaatccgt tctttttcat tgagaccata 4740

ataccatttg ccctcccaat atgaaagatt tgtatccttc ttttataaca aattttcaga 4800

aatggaatta gcttggtacg gatccctttt ataacaaatt ttcagaaatt aatattgaca 4860

gtttgataag ggcggtgcta aattcgtaat gacaagtatc ataaattggt cataacaaat 4920

atggtgcttg tctatctcgg taccctcgag aaaaggagga tgtacacatg gataagaaat 4980

actcaatagg cttagctatc ggcacaaata gcgtcggatg ggcggtgatc actgatgaat 5040

ataaggttcc gtctaaaaag ttcaaggttc tgggaaatac agaccgccac agtatcaaaa 5100

aaaatcttat aggggctctt ttatttgaca gtggagagac agcggaagcg actcgtctca 5160

aacggacagc tcgtagaagg tatacacgtc ggaagaatcg tatttgttat ctacaggaga 5220

ttttttcaaa tgagatggcg aaagtagatg atagtttctt tcatcgactt gaagagtctt 5280

ttttggtgga agaagacaag aagcatgaac gtcatcctat ttttggaaat atagtagatg 5340

aagttgctta tcatgagaaa tatccaacta tctatcatct gcgaaaaaaa ttggtagatt 5400

ctactgataa agcggatttg cgcttaatct atttggcctt agcgcatatg attaagtttc5460

gtggtcattt tttgattgag ggagatttaa atcctgataa tagtgatgtg gacaaactat 5520

ttatccagtt ggtacaaacc tacaatcaat tatttgaaga aaaccctatt aacgcaagtg 5580

gagtagatgc taaagcgatt ctttctgcac gattgagtaa atcaagacga ttagaaaatc 5640

tcattgctca gctccccggt gagaagaaaa atggcttatt tgggaatctc attgctttgt 5700

cattgggttt gacccctaat tttaaatcaa attttgattt ggcagaagat gctaaattac 5760

agctttcaaa agatacttac gatgatgatt tagataattt attggcgcaa attggagatc 5820

aatatgctga tttgtttttg gcagctaaga atttatcaga tgctatttta ctttcagata 5880

tcctaagagt aaatactgaa ataactaagg ctcccctatc agcttcaatg attaaacgct 5940

acgatgaaca tcatcaagac ttgactcttt taaaagcttt agttcgacaa caacttccag 6000

aaaagtataa agaaatcttt tttgatcaat caaaaaacgg atatgcaggt tatattgatg 6060

ggggagctag ccaagaagaa ttttataaat ttatcaaacc aattttagaa aaaatggatg 6120

gtactgagga attattggtg aaactaaatc gtgaagattt gctgcgcaag caacggacct 6180

ttgacaacgg ctctattccc catcaaattc acttgggtga gctgcatgct attttgagaa 6240

gacaagaaga cttttatcca tttttaaaag acaatcgtga gaagattgaa aaaatcttga 6300

cttttcgaat tccttattat gttggtccat tggcgcgtgg caatagtcgt tttgcatgga 6360

tgactcggaa gtctgaagaa acaattaccc catggaattt tgaagaagtt gtcgataaag 6420

gtgcttcagc tcaatcattt attgaacgca tgacaaactt tgataaaaat cttccaaatg 6480

aaaaagtact accaaaacat agtttgcttt atgagtattt tacggtttat aacgaattga 6540

caaaggtcaa atatgttact gaaggaatgc gaaaaccagc atttctttca ggtgaacaga 6600

agaaagccat tgttgattta ctcttcaaaa caaatcgaaa agtaaccgtt aagcaattaa 6660

aagaagatta tttcaaaaaa atagaatgtt ttgatagtgt tgaaatttca ggagttgaag 6720

atagatttaa tgcttcatta ggtacctacc atgatttgct aaaaattatt aaagataaag 6780

attttttgga taatgaagaa aatgaagata tcttagagga tattgtttta acattgacct 6840

tatttgaaga tagggagatg attgaggaaa gacttaaaac atatgctcac ctctttgatg 6900

ataaggtgat gaaacagctt aaacgtcgcc gttatactgg ttggggacgt ttgtctcgaa 6960

aattgattaa tggtattagg gataagcaat ctggcaaaac aatattagat tttttgaaat 7020

cagatggttt tgccaatcgc aattttatgc agctgatcca tgatgatagt ttgacattta 7080

aagaagacat tcaaaaagca caagtgtctg gacaaggcga tagtttacat gaacatattg 7140

caaatttagc tggtagccct gctattaaaa aaggtatttt acagactgta aaagttgttg 7200

atgaattggt caaagtaatg gggcggcata agccagaaaa tatcgttatt gaaatggcac 7260

gtgaaaatca gacaactcaa aagggccaga aaaattcgcg agagcgtatg aaacgaatcg 7320

aagaaggtat caaagaatta ggaagtcaga ttcttaaaga gcatcctgtt gaaaatactc 7380

aattgcaaaa tgaaaagctc tatctctatt atctccaaaa tggaagagac atgtatgtgg 7440

accaagaatt agatattaat cgtttaagtg attatgatgt cgatgccatt gttccacaaa 7500

gtttccttaa agacgattca atagacaata aggtcttaac gcgttctgat aaaaatcgtg 7560

gtaaatcgga taacgttcca agtgaagaag tagtcaaaaa gatgaaaaac tattggagac 7620

aacttctaaa cgccaagtta atcactcaac gtaagtttga taatttaacg aaagctgaac 7680

gtggaggttt gagtgaactt gataaagctg gttttatcaa acgccaattg gttgaaactc 7740

gccaaatcac taagcatgtg gcacaaattt tggatagtcg catgaatact aaatacgatg 7800

aaaatgataa acttattcga gaggttaaag tgattacctt aaaatctaaa ttagtttctg 7860

acttccgaaa agatttccaa ttctataaag tacgtgagat taacaattac catcatgccc 7920

atgatgcgta tctaaatgcc gtcgttggaa ctgctttgat taagaaatat ccaaaacttg 7980

aatcggagtt tgtctatggt gattataaag tttatgatgt tcgtaaaatg attgctaagt 8040

ctgagcaaga aataggcaaa gcaaccgcaa aatatttctt ttactctaat atcatgaact 8100

tcttcaaaac agaaattaca cttgcaaatg gagagattcg caaacgccct ctaatcgaaa 8160

ctaatgggga aactggagaa attgtctggg ataaagggcg agattttgcc acagtgcgca 8220

aagtattgtc catgccccaa gtcaatattg tcaagaaaac agaagtacag acaggcggat 8280

tctccaagga gtcaatttta ccaaaaagaa attcggacaa gcttattgct cgtaaaaaag 8340

actgggatcc aaaaaaatat ggtggttttg atagtccaac ggtagcttat tcagtcctag 8400

tggttgctaa ggtggaaaaa gggaaatcga agaagttaaa atccgttaaa gagttactag 8460

ggatcacaat tatggaaaga agttcctttg aaaaaaatcc gattgacttt ttagaagcta 8520

aaggatataa ggaagttaaa aaagacttaa tcattaaact acctaaatat agtctttttg 8580

agttagaaaa cggtcgtaaa cggatgctgg ctagtgccgg agaattacaa aaaggaaatg 8640

agctggctct gccaagcaaa tatgtgaatt ttttatattt agctagtcat tatgaaaagt 8700

tgaagggtag tccagaagat aacgaacaaa aacaattgtt tgtggagcag cataagcatt 8760

atttagatga gattattgag caaatcagtg aattttctaa gcgtgttatt ttagcagatg 8820

ccaatttaga taaagttctt agtgcatata acaaacatag agacaaacca atacgtgaac 8880

aagcagaaaa tattattcat ttatttacgt tgacgaatct tggagctccc gctgctttta 8940

aatattttga tacaacaatt gatcgtaaac gatatacgtc tacaaaagaa gttttagatg 9000

ccactcttat ccatcaatcc atcactggtc tttatgaaac acgcattgat ttgagtcagc 9060

taggaggtga ctaactcgag taaggatctc caggcatcaa ataaaacgaa aggctcagtc 9120

gaaagactgg gcctttcgtt ttatctgttg tttgtcggtg aacgctctct actagagtca 9180

cactggctca ccttcgggtg ggcctttctg cgtttatacc tagggatata ttccgcttcc 9240

tcgctcactg cagcgtcatc acgaaagaac aagacttttc accatataaa ctgctgatcg 9300

tcccgatgct gtatttaatc agcgaggaca ccgtttcccg tttaaaagcg tttacggctg 9360

acggcggcac cttagtcatg acgtatatca gcggggttgt gaatgagcat gacttaacat 9420

acacaggcgg atggcatccg gatcttcaag ctatatttgg agttgagcct cttgaaacgg 9480

acaccctgta tccgaaggat cgaaacgctg tcagctaccg cagccaaata tatgaaatga 9540

aggattatgc aaccgtgatt gatgtaaaga cagcttcagt ggaagcggtg tatcaagaag 9600

atttttatgc gcgcacgcca gcggtcacaa gccatgagta tcagcagggc aaggcgtatt 9660

ttatcggcgc gcgtttggag gatcaatttc agcgtgattt ctatgagggt ctgatcacag 9720

acctgtctct ctctccagtt tttccggttc ggcacggaaa aggcgtctcc gtacaagcga 9780

ggcaggatca ggacaatgat tatatttttg tcatgaattt cacggaagaa aaacagctgg 9840

tcacgtttga tcagagtgtg aaggacataa tgacaggaga catattgtca ggcgacctga 9900

cgatggaaaa gtatgaagtg agaattgtcg taaacacaca ttagggggta cccc 9954

<210>4

<211>3244

<212>DNA

<213> Artificial Synthesis

<400>4

ctttataagc ggattatgat tgtctttgcg gtaagcgata acccattctg cattaagctg 60

tatttggtcc atttttcgat aagtaacatc caaattaaat aattttttgg ccgaggaagg 120

aacaaatgtc ataccaattc cggcactgac taaaccaatc accatttgat attctgtggc 180

ttcctggaca atgttgggtc tgaagcccgc ttgttcacag aactgaataa aatccatgta 240

tagagtaggc catgcttctt tagcaacagt aataattggt tcatctctta aatcctcaat 300

cgtaattgat tccttagaag tcaatgggtg ttgcttaggc aaagctaaaa cacaagggct 360

gctttgggcg gtttcgatat gtaaagctgt atgctgtaag ggaggatgaa gtataccaat 420

atcaatgttg ccctttagta gctcctcctg ctgcctagac gaggatattt cacgcagttc 480

tattttcaca gatgggaatt ttttacgata ttcccggaca atcggcggca gaaattcata 540

tgtagctgat ccgacaaaac cgattacgag aaggccttgc tcgccgcggg ccgtccgctg 600

tgccagttca attccttgtc cgatttgcat caatgccatg cggcaatgat ttaaaaagat 660

ttctcctgct gcggtaagct cgacaaatcg ttttgtcctt ttcagaagcg taactccgac 720

ttcttcctcc agctgtttga tctgctggct gagaggaggc tgcgtcatgt tcagccgccg 780

ggcagccttt ccgaaatgaa gctcttcggc tactgcgata aagtattgaa gatggcgaag 840

ctccattcaa tatgcattcc tttccatagg ttaataattc gtattacata ttaatcataa 900

ggcgaatcga tattggaggt caatttccaa agagtgtata gtgaaactta tcacaagata 960

tttaaaattt tacgtttaaa atgcataata aggagtgagg gtgttacgaa ttcgagctcg 1020

gtacccgggg atcctctaga gattgtaccg ttcgtatagc atacattata cgaagttatc 1080

gattttcgtt cgtgaataca tgttataata actataacta ataacgtaac gtgactggca 1140

agagatattt ttaaaacaat gaataggttt acacttactt tagttttatg gaaatgaaag 1200

atcatatcat atataatcta gaataaaatt aactaaaata attattatct agataaaaaa 1260

tttagaagcc aatgaaatct ataaataaac taaattaagt ttatttaatt aacaactatg 1320

gatataaaat aggtactaat caaaatagtg aggaggatat atttgaatac atacgaacaa 1380

attaataaag tgaaaaaaat acttcggaaa catttaaaaa ataaccttat tggtacttac 1440

atgtttggat caggagttga gagtggacta aaaccaaata gtgatcttga ctttttagtc 1500

gtcgtatctg aaccattgac agatcaaagt aaagaaatac ttatacaaaa aattagacct 1560

atttcaaaaa aaataggaga taaaagcaac ttacgatata ttgaattaac aattattatt 1620

cagcaagaaa tggtaccgtg gaatcatcct cccaaacaag aatttattta tggagaatgg 1680

ttacaagagc tttatgaaca aggatacatt cctcagaagg aattaaattc agatttaacc 1740

ataatgcttt accaagcaaa acgaaaaaat aaaagaatat acggaaatta tgacttagag 1800

gaattactac ctgatattcc attttctgat gtgagaagag ccattatgga ttcgtcagag 1860

gaattaatag ataattatca ggatgatgaa accaactcta tattaacttt atgccgtatg 1920

attttaacta tggacacggg taaaatcata ccaaaagata ttgcgggaaa tgcagtggct 1980

gaatcttctc cattagaaca tagggagaga attttgttag cagttcgtag ttatcttgga 2040

gagaatattg aatggactaa tgaaaatgta aatttaacta taaactattt aaataacaga 2100

ttaaaaaaat tataaataac ttcgtatagc atacattata cgaacggtag aatcgtcgac 2160

ctgcaggcat gcaagcttgg cactggccgt caagaaaaaa agaaagcccc ttttagcagg 2220

gctttctttt tatttggctc ttttcctgat tttagataaa ataacatcaa aacagtaaag 2280

gtgtggtctg atgaaaatat tggttttggc agtgcatcct catatggaga cctcagttgt 2340

taataaggcg tgggctgagg aattgagtaa acatgacaat atcacagtac gggatcttta 2400

taaggaatac ccggatgaag cgatagatgt tgcgaaggaa cagcagctgt gcgaggaata 2460

cgatcggatt gtctttcaat tcccgctata ttggtacagc tctccgccgc tcttgaaaaa 2520

atggcaggat cttgtgctga cttatggctg ggcttttggt tcagaaggaa atgccttgca 2580

tggcaaggag ctgatgctgg ctgtatcaac agggagcgaa gcggaaaaat atcaagcggg 2640

cggagcaaat cattactcga tcagtgagct attgaaacca tttcaggcca cgagtaatct 2700

gatcggcatg aagtatctgc ctccatatgt gttctatggc gtgaattatg cagctgcaga 2760

ggatatttct cacagtgcaa aacggttagc cgaatacatc cagcagcctt ttgtttaaaa 2820

tacagccctg tccaacatac ggcagggctg tatttgttta aaaatccggc agctcagaca 2880

ggttattttc cttgatgccg tccggttcac ttcgcaaaat gtcacgcccg tatttatgga 2940

agacatcaac atgagcgagt tttcctgatt ttgcttctga cagcgcagta gggtagtcga 3000

gctctcttcc tgtattggtt ttcactgcga taatattgtc ttcctcattt cttctaaccg 3060

caataatttc ttcttttcca gatggaacat tttcttgatc ggcagttgtt tgccgggctt 3120

tatacgattc atatgctgct tcaaattgat ccatatttac acctccgctt tttagcgtga 3180

acaaaaatgt cgatgatcat gtaaggtttc gacacagcat acgacaatat ttcctgagaa 3240

atat 3244

<210>5

<211>113

<212>DNA

<213> Artificial Synthesis

<400>5

cttttataac aaattttcag aaattaatat tgacagtttg ataagggcgg tgctaaattc 60

gtaatgacaa gtatcataaa ttggtcataa caaatatggt gcttgtctat ctc 113

<210>6

<211>114

<212>DNA

<213> Artificial Synthesis

<400>6

ttttgtcaaa ataattttat tgacaacgtc ttattaacgt tgatataatt taaattttat 60

ttgacaaaaa tgggctcgtg ttgtacaata aatgtcgtaa attggtcata acaa 114

<210>7

<211>97

<212>DNA

<213> Artificial Synthesis

<400>7

ttttgtcaaa ataattttat tgacaacgtc ttattaacgt tgatataatt taaattttat 60

ttgacataaa ttggtcataa caatacaata aatgtcg 97

<210>8

<211>97

<212>DNA

<213> Artificial Synthesis

<400>8

ttttgtcaaa ataattttat tgacaacgtc ttattaacgt tgataaattg gtcataacaa 60

ttgacaaaaa tgggctcgtg ttgtacaata aatgtcg 97

<210>9

<211>114

<212>DNA

<213> Artificial Synthesis

<400>9

ttttgtcaaa ataattttat tgacaacgtc ttattaacgt tgatataatt taaattttat 60

ttgacataaa ttggtcataa caatacaata aatgtcgtaa attggtcata acaa 114

<210>10

<211>114

<212>DNA

<213> Artificial Synthesis

<400>10

ttttgtcaaa ataattttat tgacaacgtc ttattaacgt tgataaattg gtcataacaa 60

ttgacaaaaa tgggctcgtg ttgtacaata aatgtcgtaa attggtcata acaa 114

<210>11

<211>97

<212>DNA

<213> Artificial Synthesis

<400>11

ttttgtcaaa ataattttat tgacaacgtc ttattaacgt tgataaattg gtcataacaa 60

ttgacataaa ttggtcataa caatacaata aatgtcg 97

<210>12

<211>114

<212>DNA

<213> Artificial Synthesis

<400>12

ttttgtcaaa ataattttat tgacaacgtc ttattaacgt tgataaattg gtcataacaa 60

ttgacataaa ttggtcataa caatacaata aatgtcgtaa attggtcata acaa 114

<210>13

<211>253

<212>DNA

<213> Artificial Synthesis

<400>13

cgagctttct taccttgacg gcagaaataa gctcgaagat tacgacatct taacattgat 60

gaaatactaa ggataaccgc ataacgaaaa agcactccat gtcagggtgc ttttttccta 120

ttgttttgca tttattttat ataatatttg gctatttgaa cttctgctct ttacatcttt 180

cgtttttttc ttgtaaattc gtaatgacaa gtatcataaa ttggtcataa caaatatggt 240

gcttgtctat ctc 253

<210>14

<211>258

<212>DNA

<213> Artificial Synthesis

<400>14

tcaatatgtt ttcaaaagcc ggaaaagcgc tttcggacac cgtaaccaat actgcccagt 60

caatgtatga atggatacgg gatatgaatc aataagtacg tgaaagagaa aagcaaccca 120

gatatgatag ggaacttttc tctttcttgt tttacattga atctttacaa tcctattgat 180

ataatctaag ctagtgtata aattcgtaat gacaagtatc ataaattggt cataacaaat 240

atggtgcttg tctatctc 258

<210>15

<211>183

<212>DNA

<213> Artificial Synthesis

<400>15

aatgtttagt ggaaatgatt gcggcatccc gcaaaaaata ttgctgtaaa taaactggaa 60

tctttcggca tcccgcatga aacttttcac ccatttttcg ttgacaaaaa catttttttc 120

atttaaattc gtaatgacaa gtatcataaa ttggtcataa caaatatggt gcttgtctat 180

ctc 183

<210>16

<211>183

<212>DNA

<213> Artificial Synthesis

<400>16

aatgtttagt ggaaatgatt gcggcatccc gcaaaaaata ttgctgtaaa taaactggaa 60

tctttcggca tcccgcatga aacttttcac ccatttttcg ttgacaaaaa catttttttc 120

atttaaattc gtaatgacaa gtatcataaa ttggtcataa caaatatggt gcttgtctat 180

ctc 183

<210>17

<211>183

<212>DNA

<213> Artificial Synthesis

<400>17

aatgtttagt ggaaatgatt gcggcatccc gcaaaaaata ttgctgtaaa taaactggaa 60

tctttcggca tcccgcatga aacttttcac ccatttttcg ttgacataaa ttggtcataa 120

caataaattc gtaatgacaa gtatcataaa ttggtcataa caaatatggt gcttgtctat 180

ctc 183

<210>18

<211>200

<212>DNA

<213> Artificial Synthesis

<400>18

aatgtttagt ggaaatgatt gcggcatccc gcaaaaaata ttgctgtaaa taaactggaa 60

tctttcggca tcccgcatga aacttttcac ccatttttcg taaattggtc ataacaattg 120

acaaaaacat ttttttcatt taaattcgta atgacaagta tcataaattg gtcataacaa 180

atatggtgct tgtctatctc 200

<210>19

<211>200

<212>DNA

<213> Artificial Synthesis

<400>19

aatgtttagt ggaaatgatt gcggcatccc gcaaaaaata ttgctgtaaa taaactggaa 60

tctttcggca tcccgcatga aacttttcac ccatttttcg taaattggtc ataacaattg 120

acataaattg gtcataacaa taaattcgta atgacaagta tcataaattg gtcataacaa 180

atatggtgct tgtctatctc 200

<210>20

<211>4238

<212>DNA

<213> Artificial Synthesis

<400>20

tcgagttcat gtgcagctcc atcagcaaaa ggggatgata agtttatcac caccgactat 60

ttgcaacagt gccgttgatc gtgctatgat cgactgatgt catcagcggt ggagtgcaat 120

gtcatgaggg aagcggtgat cgccgaagta tcgactcaac tatcagaggt agttggcgtc 180

atcgagcgcc atctcgaacc gacgttgctg gccgtacatt tgtacggctc cgcagtggat 240

ggcggcctga agccacacag tgatattgat ttgctggtta cggtgaccgt aaggcttgat 300

gaaacaacgc ggcgagcttt gatcaacgac cttttggaaa cttcggcttc ccctggagag 360

agcgagattc tccgcgctgt agaagtcacc attgttgtgc acgacgacat cattccgtgg 420

cgttatccag ctaagcgcga actgcaattt ggagaatggc agcgcaatga cattcttgca 480

ggtatcttcg agccagccac gatcgacatt gatctggcta tcttgctgac aaaagcaaga 540

gaacatagcg ttgccttggt aggtccagcg gcggaggaac tctttgatcc ggttcctgaa 600

caggatctat ttgaggcgct aaatgaaacc ttaacgctat ggaactcgcc gcccgactgg 660

gctggcgatg agcgaaatgt agtgcttacg ttgtcccgca tttggtacag cgcagtaacc 720

ggcaaaatcg cgccgaagga tgtcgctgcc gactgggcaa tggagcgcct gccggcccag 780

tatcagcccg tcatacttga agctagacag gcttatcttg gacaagaaga agatcgcttg 840

gcctcgcgcg cagatcagtt ggaagaattt gtccactacg tgaaaggcga gatcaccaag 900

gtagtcggca aataagatgc cgctcgccag tcgattggct gagctcatga agttcctatt 960

ccgaagttcc gcgaacgcgt aaaggatcta ggtgaagatc ctttttgata atctcatgac 1020

caaaatccct taacgtgagt tttcgttcca ctgagcgtca gaccccgtag aaaagatcaa 1080

aggatcttct tgagatcctt tttttctgcg cgtaatctgc tgcttgcaaa caaaaaaacc 1140

accgctacca gcggtggttt gtttgccgga tcaagagcta ccaactcttt ttccgaaggt 1200

aactggcttc agcagagcgc agataccaaa tactgtcctt ctagtgtagc cgtagttagg 1260

ccaccacttc aagaactctg tagcaccgcc tacatacctc gctctgctaa tcctgttacc 1320

agtggctgct gccagtggcg ataagtcgtg tcttaccggg ttggactcaa gacgatagtt 1380

accggataag gcgcagcggt cgggctgaac ggggggttcg tgcacacagc ccagcttgga 1440

gcgaacgacc tacaccgaac tgagatacct acagcgtgag ctatgagaaa gcgccacgct 1500

tcccgaaggg agaaaggcgg acaggtatcc ggtaagcggc agggtcggaa caggagagcg 1560

cacgagggag cttccagggg gaaacgcctg gtatctttat agtcctgtcg ggtttcgcca 1620

cctctgactt gagcgtcgat ttttgtgatg ctcgtcaggg gggcggagcc tatggaaaaa 1680

cgccagcaac gcggcctttt tacggttcct ggccttttgc tggccttttg ctcacatgtt 1740

ctttcctgcg ttatcccctg attctgtgga taaccgtatt accgcctttg agtgagctga 1800

taccgctcgc cgcagccgaa cgaccgagcg cagcgagtca gtgagcgagg aagcggaaga 1860

gcgcctgatg cggtattttc tccttacgca tctgtgcggt atttcacacc gcatatgctg 1920

gatccgcgat gtttgcaaaa cgattcaaaa cctctttact gccgttattc gctggatttt 1980

tattgctgtt tcatttggtt ctggcaggac cggcggctgc gagtgctgaa acggcgaaca 2040

aatcgaatga gcttacagca ccgtcgatca aaagcggaac cattcttcat gcatggaatt 2100

ggtcgttcaa tacgttaaaa cacaatatga aggatattca tgatgcagga tatacagcca 2160

ttcagacatc tccgattaac caagtaaagg aagggaatca aggagataaa agcatgtcga 2220

actggtactg gctgtatcag ccgacatcgt atcaaattgg caaccgttac ttaggtactg 2280

aacaagaatt taaagaaatg tgtgcagccg ctgaagaata tggcataaag gtcattgttg 2340

acgcggtcat caatcatacc accagtgatt atgccgcgat ttccaatgag gttaagagta 2400

ttccaaactg gacacatgga aacacacaaa ttaaaaactg gtctgatcga tgggatgtca 2460

cgcagaacat gccatggcat gagattctac cgttcgtata gcatacatta tacgaagtta 2520

tcttgatatg gctttttata tgtgttactc tacatacaga aaggaggaac taaatatggc 2580

caagttgacc agtgccgttc cggtgctcac cgcgcgcgac gtcgccggag cggtcgagtt 2640

ctggaccgac cggctcgggt tctcccggga cttcgtggag gacgacttcg ccggtgtggt 2700

ccgggacgac gtgaccctgt tcatcagcgc ggtccaggac caggtggtgc cggacaacac 2760

cctggcctgg gtgtgggtgc gcggcctgga cgagctgtac gccgagtggt cggaggtcgt 2820

gtccacgaac ttccgggacg cctccgggcc ggccatgacc gagatcggcg agcagccgtg 2880

ggggcgggag ttcgccctgc gcgacccggc cggcaactgc gtgcacttcg tggccgagga 2940

gcaggactga ataacttcgt atagcataca ttatacgaac ggtaaatcgt cgacctgcag 3000

gcttattaac gttgatataa tttaaatttt atttgacaaa aatgggctcg tgttgtacaa 3060

taaatgtaca agtgttggcc aaggaacgtt ttagagctag aaatagcaag ttaaaataag 3120

gctagtccgt tatcaacttg aaaaagtggc accgagtcgg tgcttttttt gaattccgtc 3180

gacatggatg agcgatgatg atatccgttt aggctgggcg gtgatagctt ctcgttcagg 3240

cagtacgcct cttttctttt ccagacctga gggaggcgga aatggtgtga ggttcccggg 3300

gaaaagccaa ataggcgatc gcgggagtgc tttatttgaa gatcaggcta tcactgcggt 3360

caatagattt cacaatgtga tggctggaca gcctgaggaa ctctcgaacc cgaatggaaa 3420

caaccagata tttatgaatc agcgcggctc acatggcgtt gtgctggcaa atgcaggttc 3480

atcctctgtc tctatcaata cggcaacaaa attgcctgat ggcaggtatg acaataaagc 3540

tggagcgggt tcatttcaag tgaacgatgg taaactgaca ggcacgatca atgccaggtc 3600

tgtagctgtg ctttatcctg atgatattgc aaaagcgcct catgttttcc ttgagaatta 3660

caaaacaggt gtaacacatt ctttcaatga tcaactgacg attaccttgc gtgcagatgc 3720

gaatacaaca aaagccgttt atcaaatcaa taatggacca gagacggcgt ttaaggatgg 3780

agatcaattc acaatcggaa aaggagatcc atttggcaaa acatacacca tcatgttaaa 3840

aggaacgaac agtgatggtg taacgaggac cgagaaatac agttttgtta aaagagatcc 3900

agcgtcggcc aaaaccatcg gctatcaaaa tccgaatcat tggagccagg taaatgctta 3960

tatctataaa catgatggga gccgagtaat tgaattgacc ggatcttggc ctggaaaacc 4020

aatgactaaa aatgcagacg gaatttacac gctgacgctg cctgcggaca cggatacaac 4080

caacgcaaaa gtgattttta ataatggcag cgcccaagtg cccggtcaga atcagcctgg 4140

ctttgattac gtgctaaatg gtttatataa tgactcgggc ttaagcggtt ctcttcccca 4200

ttgacccaag cttagatcta ttaccctgtt atccctac 4238

Claims (10)

1. A method for promoting N-acetylglucosamine synthesis is characterized in that a GlcN6P sensing component is used for controlling the expression of N-acetylglucosamine acetylase GNA1 to dynamically regulate the N-acetylglucosamine synthesis pathway; simultaneously, dCas9 protein expressed by utilizing GlcN6P sensing component is regulated and controlled, and three proteins respectively act on zwf, pfkA anda complex formed by combining sgRNA expression fragments of the glmM gene dynamically weakens glycolysis pathway, pentose phosphate pathway and peptidoglycan synthesis pathway; the GlcN6P sensing component comprises a transcription factor GamR and a promoter containing a GamR binding site, wherein the transcription factor GamR contains the 1 st to 235 th sites of an amino acid sequence with NCBI number WP _015382651.1, and the promoter is P_gamAA promoter or a hybrid promoter constructed by adding a GamR binding site to a constitutive promoter.

2. The method of claim 1, wherein said promoter P is_gamAThe nucleotide sequence of (A) is shown in SEQ ID NO. 5.

3. The method according to claim 1, wherein the amino acid sequence of the N-acetylglucosamine acetylase GNA1 is represented by SEQ ID No. 2; the N-acetylglucosamine acetylase GNA1 takes a vector pSTg-GNA1 as an expression vector, and the nucleotide sequence of the vector pSTg-GNA1 is shown in SEQ ID No. 1.

4. The method of claim 1, wherein the amino acid sequence of the dCas9 protein is as set forth in SEQ ID No.1 of patent CN 108148797A; the dCas9 protein is integrated and expressed by using a vector pLCg-dCas9 as an expression vector, and the nucleotide sequence of the vector pLCg-dCas9 is shown in SEQ ID NO. 3.

5. The method according to claim 1, wherein the nucleotide sequence of the sgRNA expression fragment acting on zwf is shown as SEQ ID No.2 in patent CN 108148797A; the nucleotide sequence of the sgRNA expression fragment acting on pfkA is shown as SEQ ID NO.3 in patent CN 108148797A; the nucleotide sequence of the sgRNA expression fragment acting on glmM is shown as SEQ ID NO.4 in patent CN 108148797A; the expression fragment of the sgRNA is integrated on the recombinant bacillus subtilis genome through a transformation vector psga-zpg, and the nucleotide sequence of the vector psga-zpg is shown as SEQ ID NO.7 in a patent CN 108148797A.

6. The method of any one of claims 1 to 5, further comprising simultaneously knocking out the key gene for the synthesis of acetoin, alsSD, as a by-product.

7. A recombinant Bacillus subtilis characterized in that the recombinant Bacillus subtilis dynamically regulates the N-acetylglucosamine synthesis pathway by controlling the expression of N-acetylglucosamine acetylase GNA1 using a GlcN6P sensing component; simultaneously, a GlcN6P sensing component is used for regulating and controlling the expressed dCas9 protein and three complexes formed after sgRNA expression fragments which respectively act on zwf and pfkA and glmM genes are combined to dynamically weaken glycolysis pathways, pentose phosphate pathways and peptidoglycan synthesis pathways; the GlcN6P sensing component comprises a transcription factor GamR and a promoter containing a GamR binding site, wherein the transcription factor GamR contains the 1 st to 235 th sites of an amino acid sequence with NCBI number WP _015382651.1, and the promoter is P_gamAA promoter or a hybrid promoter constructed by adding a GamR binding site to a constitutive promoter.

8. The recombinant Bacillus subtilis of claim 7 wherein the Bacillus subtilis BSGNY-P is Bacillus subtilis_veg-glmS-P₄₃-GNA1 as the starting strain; the starting strain is obtained by modifying the genotype of a bacillus subtilis 168 serving as a basis as follows: Δ nagP Δ gamP Δ gamA Δ nagA Δ nagB Δ ldh Δ pta Δ glcK Δ pckA Δ pyk lox72 with promoter P_vegRegulated expression of the phosphatase yqaB from E.coli with glmS of Bacillus subtilis 168 itself, on a plasmid with promoter P₄₃Modulating recombinant expression of GNA 1.

9. A method for producing acetylglucosamine, which is characterized in that the recombinant Bacillus subtilis of claim 7 or 8 is placed in 35-39 ℃, 200-220rpm, cultured for 10-15h, transferred into a shake flask fermentation medium with the inoculation amount of 1-10%, and cultured for 50-70h at 35-39 ℃ under 200-220 pm; or, the method is that the recombinant Bacillus subtilis of claim 7 or 8 is placed in 35-39 ℃, 200-220rpm and cultured for 10-15h, seeds are transferred into the fermentation medium of the upper tank with the inoculation amount of 1-10%, cultured in the fermentation tank with the liquid loading amount of 30-50% under the conditions of 35-39 ℃, pH6.5-7.5, the ventilation amount is 1-2vvm, the rotation speed is controlled between 500-900rpm to maintain the dissolved oxygen at more than 30%, and 750g/L is continuously added to control the glucose concentration between 1-30 g/L.

10. Use of the recombinant bacillus subtilis according to any one of claims 7 to 8 or the method for promoting N-acetylglucosamine synthesis according to any one of claims 1 to 6 in the fields of food, pharmaceutical, nutraceutical or cosmetic products.

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